US4869982A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electrophotographic photoreceptor containing a toner release material
Assignee: X-Solve Inc
•
Filing: 1987-04-30
•
Granted: 1989-09-26
•
Expires: 2007-04-30
Abstract
Abstract An organic photosensitive member for use in electrophotography comprising a conductive substrate and one or more electrically operative layers is disclosed. The imaging layer of the member contains from about 0.5 to about 20 percent of a toner release agent selected from the group of materials composed of stearates, silicon oxides, and fluorocarbons.
Inventors
- 👤 William J. Murphy
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 15:38
CPC Classifications
G; G03; G03G; G03G5/00; G03G5/02; G03G5/04; G03G5/05; G03G5/0503; G03G5/051; G03G5/0514; G03G5/0507
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
47 words
An eleotrophotographic photoreceptor comprising: (a) a conductive supporting substrate; and (b) a photosensitive member comprising an electrically active transport material and a photogenerating material, the imaging surface layer of said member having dispersed therein from about 0.5 to 20 weight percent of a stearate toner release agent.
Claim 2
Dependent Claim
47 words
An eleotrophotographic photoreceptor comprising: (a) a conductive supporting substrate; and (b) a photosensitive member comprising an electrically active transport material and a photogenerating material, the imaging surface layer of said member having dispersed therein from about 0.5 to 20 weight percent of a stearate toner release agent.
Claim 3
Dependent Claim
28 words
The electrophotographic photoreceptor of claim 1 wherein the photosensitive member is a monolayer comprising charge transport material having the photogenerating material and the toner release agent dispersed therein.
Claim 4
Dependent Claim
28 words
The electrophotographic photoreceptor of claim 2 wherein the toner release agent is dispersed in a gradient concentration throughout the monolayer, the larger concentration occurring at the imaging surface.
Claim 5
Dependent Claim
15 words
The electrophotographic photoreceptor of claim 1 wherein the toner release material is a metallic stearate.
Claim 6
Dependent Claim
34 words
The electrophotographic photoreceptor of claim 1 wherein the photosensitive member comprises a sandwich layer of charge generation material and an imaging surface overlayer of charge transport material having the toner release agent dispersed therein.
Claim 7
Dependent Claim
35 words
The electrophotographic photoreceptor of claim 1 wherein the photosensitive member comprises an interface layer of charge transport material and an imaging surface over layer of charge generation material having the toner release agent dispersed therein.
Claim 8
Dependent Claim
24 words
The electrophotographic photoreceptor of claim 1 further comprising a thin imaging overlayer surface of a polymeric resin having the toner release agent dispersed therein.
Claim 9
Dependent Claim
31 words
The electrophotographic photoreceptor of claim 1 wherein the charge transport materials are selected from the group of electrical active materials comprising triphenylmethanes, hydrazones, oxadiazoles, diamines, pyrazolines, styrils, antracenes, triazoles, and stilbenes.
Claim 10
Dependent Claim
26 words
The electrophotographic photoreceptor of claim 1 wherein the photogenerating material is selected from the group of inorganic photoconductors comprising - selenium, selenium alloys and cadmium sulfide.
Claim 11
Dependent Claim
29 words
The electrophotographic photoreceptor of claim 1 wherein the photogenerating material is selected from the group of organic pigment photoconductors comprising phthalocyanines, azos, squaryliums, perylenes, quinones, quinacridones, cyanimes and anthanthrones.
Claim 12
Dependent Claim
14 words
The electrophotographic photographic photoreceptor of claim 1 wherein the photogenerating material is poly (N-vinylcarbazole).
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1992-09-25 | 1993-03-27 | 1993-09-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-09-25 | 1997-03-27 | 1997-09-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-09-25 | 2001-03-27 | 2001-09-26 | $7700.00 | Window Closed / Lapsed |